<obout:SuperForm ID="SuperForm1"
         runat="server"
         DataSourceID="SqlDataSource1"
         AutoGenerateRows="false">
        <Fields>
            <obout:TemplateField HeaderText="Country">
                <ItemTemplate>
                    <%# GetCountries(Eval("CountryIds").ToString()) %>
                </ItemTemplate>
                <EditItemTemplate>
                        <obout:ListBox  runat="server" ID="CountryIds"  DataSourceID="SqlDataSource2"
                         DataValueField="CountryID" DataTextField="CountryName" SelectionMode="Multiple"
                        SelectedValue='<%# Eval("CountryIds").ToString() %>' />
                </EditItemTemplate>
            </obout:TemplateField>
        </Fields>
</obout:SuperForm>